package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.mapper.UserMapper;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
* @author 马毅爽
* @description 针对表【user(用户信息)】的数据库操作Service实现
* @createDate 2023-11-08 20:33:25
*/
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
    implements UserService{

    @Autowired
    private WeChatProperties weChatProperties;

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {

        String openid = getOpenId(userLoginDTO.getCode());

        //判断openid是否为空
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断用户是否是新用户
        User user = getOne(new LambdaQueryWrapper<User>().eq(User::getOpenid,openid));
        if (user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now()).build();
            save(user);
        }
        //如果是新用户，自动完成注册
        return user;
    }

    private String getOpenId(String code){
        //调用微信接口服务，获取当前用户的openid
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN,map);

        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject.getString("openid");
    }
}




